Systems: Network Reliability Engineer (3325FF8)

Referment; New York (NY); On-site; USD 120,000 - 190,000; Full time

Job summary

Referment is seeking a Network Reliability Engineer to own and enhance a complex production network across Linux/Windows, high‑performance networks, and storage infrastructure. You will operate, troubleshoot, and automate changes, implementing zero‑trust access and strong observability with Splunk, SolarWinds, and Zabbix, while contributing to cloud‑native networking initiatives.

This hands‑on role requires five+ years of network experience, strong BGP/OSPF fundamentals, and firewall expertise

Qualifications

• Five+ years of hands-on experience operating and engineering production networks at scale.
• Strong fundamentals across UDP, TCP/IP, BGP and OSPF; knowledge of PIM/IGMP multicast.
• Extensive hands-on experience with enterprise firewall/security platforms: Palo Alto, Fortinet, Cisco ASA.
• Proficiency in network automation and configuration management: Ansible.
• Experience writing/maintaining automation, ideally in Python.
• Hands-on with Zero Trust architectures and secure access solutions (Zscaler ZIA/ZPA, Cisco ISE, FortiNAC).
• Experience with observability/monitoring tools such as Splunk, SolarWinds, Zabbix.
• Technical degree or equivalent experience.
• Certifications like CCNP or PCNSE are desirable.
• Experience with cloud-native networking and hybrid connectivity (AWS VPC, Direct Connect, Azure Networking).

Responsibilities

• Operate and engineer production network infrastructure focusing on stability and safe change.
• Diagnose high-impact problems under pressure with attention to detail.
• Administer network, monitoring, and security platforms in a cross-platform environment.
• Develop automation to remove manual work and manage configuration as code.
• Implement and maintain Zero Trust access solutions (Zscaler ZIA/ZPA, Cisco ISE, FortiNAC).
• Make network health measurable with metrics and diagnostic tooling (Splunk, SolarWinds, Zabbix).
• Contribute to broader infrastructure projects, including cloud-native networking and hybrid connectivity.

Skills

Network engineering

On-call experience

TCP/IP fundamentals

BGP/OSPF knowledge

Zero Trust architecture

Firewall security

Python scripting

Education

Bachelor’s degree in a related field

Tools

Palo Alto

Fortinet

Cisco ASA

Ansible

Splunk

SolarWinds

Zabbix

Zscaler ZIA/ZPA

Cisco ISE

FortiNAC

AWS VPC

Direct Connect

Azure Networking

Job description

Referment is working with an investment and technology organisation seeking a Network Reliability Engineer for a hands-on infrastructure engineering role.

You will join a cross-platform systems team responsible for the reliability and continuing improvement of a complex production environment spanning Linux and Windows systems, business applications, high-performance networks and storage infrastructure. The remit combines operational ownership with engineering projects: resolving difficult incidents, improving observability, automating repetitive work and making changes safely.

The Role

• Operate and engineer production network infrastructure with a focus on stability, reliability and safe change.
• Diagnose unfamiliar, high-impact technical problems under pressure with high attention to detail.
• Administer network, monitoring and security platforms across a cross-platform environment, with a focus on Palo Alto, Fortinet and Cisco ASA.
• Develop automation using industry-standard frameworks to remove manual work, improve efficiency and manage configuration as code.
• Implement and maintain Zero Trust architecture and secure access solutions such as Zscaler (ZIA/ZPA), Cisco ISE or FortiNAC.
• Make network health measurable through effective metrics, monitoring and diagnostic tooling including Splunk, SolarWinds and Zabbix.
• Contribute to broader infrastructure engineering projects, including cloud-native networking and hybrid connectivity.

What We're Looking For

• At least five years of hands-on experience operating and engineering production networks at scale, including on-call responsibility.
• Strong fundamentals across UDP, TCP/IP, BGP and OSPF, with working knowledge of PIM and IGMP multicast technologies.
• Extensive hands-on experience with modern enterprise firewall and security platforms, specifically Palo Alto, Fortinet and Cisco ASA.
• Proficiency in industry-standard network automation and declarative configuration management tools, specifically Ansible.
• Experience writing and maintaining automation, ideally using Python.
• Hands‑on experience with Zero Trust architecture and secure access solutions (e.g. Zscaler ZIA/ZPA, Cisco ISE, FortiNAC).
• Experience with standard network observability and monitoring suites such as Splunk, SolarWinds or Zabbix.
• A technical degree or equivalent professional experience.
• Relevant industry certifications such as CCNP or PCNSE are highly desirable.
• Experience with cloud-native networking and hybrid connectivity, such as AWS VPC, Direct Connect or Azure Networking, is a plus.

This could suit a senior network engineer, network automation engineer, network-focused site reliability engineer, or infrastructure engineer who has owned large production networks.

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